Has anyone bought the hcg test from Walmart and experienced a evap line ? Because I'm pretty sure I have not ever and. I know after 10 mins they are invalid but as many as I have taken and checked on them the next day did I ever had a positive show up . Now when I took this test I didn't give it the fair time to read it in I was disappointed and sad and I'm trying to not lose hope here as my legs are shaking at this very moment ! Please someone answer me !!!